Input: cypress-sf - constify struct i2c_device_id

'struct i2c_device_id' is not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig:
Before:
======
   text	   data	    bss	    dec	    hex	filename
   6438	    618	      0	   7056	   1b90	drivers/input/keyboard/cypress-sf.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   6502	    554	      0	   7056	   1b90	drivers/input/keyboard/cypress-sf.o

Signed-off-by: Christophe JAILLET <[email protected]>
Link: https://lore.kernel.org/r/4bc3e3b4d10223d9df850fe4ba48f1cefd197082.1731689418.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Dmitry Torokhov <[email protected]>

drivers/input/keyboard/cypress-sf.c

@@ -208,7 +208,7 @@ static int cypress_sf_resume(struct device *dev)
 static DEFINE_SIMPLE_DEV_PM_OPS(cypress_sf_pm_ops,
 				cypress_sf_suspend, cypress_sf_resume);
 
-static struct i2c_device_id cypress_sf_id_table[] = {
+static const struct i2c_device_id cypress_sf_id_table[] = {
 	{ CYPRESS_SF_DEV_NAME },
 	{ }
 };